Thomas Marusak, whose company creates high-end window shades and blinds, is designing plans to expand on 21 acres he just bought in Watervliet.

Comfortex Corp. paid $4.95 million for its 104,000-square-foot headquarters and surrounding property, according to a deed filed this month. Marusak had leased the same site for the past 17 years.

“We carefully reviewed the land to make sure we could expand,” said Marusak, president and co-founder.

Now, Marusak is pursuing an overhaul of the office space at Comfortex. The redesigned offices are expected to stamp the transition that Comfortex has made toward digital production. The company has 310 local employees and operates a plant in Phoenix.

Comfortex, which is 26 years old, was acquired by Hunter Douglas in 1999.

Sales took a beating when the housing market collapsed, falling from $77 million locally in 2008 to $50 million last year.

During the slump and ensuing layoffs, Marusak and his team created a new manufacturing process that boosts profit and slashes production costs—while also enabling Comfortex to make new items.

Customers now can design their own products, even with personal photos. Comfortex has bought licenses to logos of colleges and Major League Baseball teams, and contracted with HGTV personality Carriann Arkowski.

“We need to create a physical environment commensurate with the business position we’ve established,” Marusak said.